(If given the option, it is a no-brainer to counter the Charm spell.  Sorry, Mulligan.)

Varan CON save to avoid Poison:  21

Varan CON save to maintain concentration on keeping Keyleth invisible:  25

Mulligan DC 18 Dex Save:  11

     And with the Evasion feature, Mulligan will take either half damage or none...

Mulligan does take 6 damage from the Chain Attack...  Mulligan DC 13 Wisdom Save: 3

Mulligan is frightened of the Chain Devil.  A reasonable reaction, methinks.

Quote from Bartjeebus >>

(If given the option, it is a no-brainer to counter the Charm spell.  Sorry, Mulligan.) 

No worries.  If I could roll worth a damn I'd have taken no damage anyway. 

Real Avarice Con save: 15

(Offhand does anyone know how many rounds we have been going?)

Wulgar hopes to finish off the Kyton, takes a couple of swings at it with his great axe. If it goes down, he turns to the Erinyes and attacks.  "Keep at it lads!"

Great axe swing 1 : Attack: 17 Damage: 18 

Great axe swing 2: Attack: 26 Damage: 21 

On the first hit, damage from Divine Fury :  7 

(I think clock changed 4 times?)

Avarice Con save for Hex spell: 4 (Almost forgot)

The real Avarice gives his better self a grateful nod and then turns on his worse self and blasts it with three beams of purple crackling force.
Eldritch blast: 15 Force: 8
Eldritch blast: 27 Force: 13
Eldritch blast: 19 Force: 12

In case the chained Avarice still isn't finished, Varan will send a crossbow bolt his way.

Attack: 15 Damage: 13

Varan isn't worried about the Erinyes, as it should depart back to the lower planes once its summoner is destroyed.

Keyleth moves to the Kyton and slashes at it.

Main hand: 27 Damage: 8 piercing

Offhand: 21 Damage: 8 piercing

Sneak attack: 28 piercing

Fearful of the Chain Devil, Mulligan is still able to continue using his rapier against the evil Avarice...  Well, the doppelgänger Avarice, to be more precise.

Rapier Attack: 17 Damage: 13   plus 4 to Attack due to Bless

Rapier Attack: 14 Damage: 13   plus 3 to Attack due to Bless

First attack to hit also does 10 in Sneak Attack Damage

And if either hit, Mulligan will again use Defensive flourish to add 4 to that attack's damage, plus his AC until start of next round...

(Mulligan: feel free to take back a use of your Defensive Flourish since the first attack did it in).

(I’ll get back to you with an exact round count soon, Wulgar, but your rage should still be active at this point). 

Wulgar’s greataxe, Avarice’s blasts, Keyleth’s slashes, and one final slice from Mulligan’s blades end the Kyton’s ability to fight; the animated mass of chains held together loosely by twisted flesh crumbles, sending bloodied chains flinging over the battlefield. 

A moment of quiet passes as the ticking of the clock winds down - the winged Avarice raises his hands, evoking a pulse of healing light. Divide 100 hit points of healing among yourselves. 

“I’m watching, Avarice. I exist, yes - so did he. We are all you; simply drawn from different times, different worlds,” the Celestial irritably groans. “It’s your choice what you wish to do. I know little of your captor - only that he seeks to replace the judgement of death.” 

(OOC: you have two rounds until the clock changes again - feel free to heal, buff, prepare, or converse as you see fit.)

"Just stay with us and maybe I will see the wrongs with my life." Avarice says to his celestial variant. "I still have to survive this to repent, to become you, right?"
(Avaraice leaves the healing light to the others to bask in. He has no preparations to do but is ready to do battle again as the clock strikes.)

Varan will greedily absorb 25hp of that healing magic for himself.

He will also do the following over these two rounds:

1. First, he will expend a bonus action to convert a 3rd level spell into 3 sorcery points. 
2. Next round, he will spend 7 sorcery points to generate a new 5th level spell slot.

Finally, he will offer a murderer's pep talk to his allies.  "Move close to the remaining enemies so you may strike when they awaken!  Select a target, overwhelm it and put it down, quickly!  I am down to only a few precious killing spells and will need to use them when the time it right."

Keyleth should take 20 of remaining HP, Wulgar 20 and Ragnar the other 35, IMO...

Mulligan has no prep needed...

"Surviving is not enough." As soon as the Celestial utters these words, the clock once again begins to shift. 

What time is it? 20
Tick, tock: 5

The whirling halts as both hands halt near the second Wulgar - this one hobbles along on a pegleg, wields a scimitar, and wears a diseased-looking parrot gawking on his shoulder. It flashes a rotten-toothed grin and rears to attack. 

"It is for me." The real Avarice calls out to his better self and then turns on pegleg Wulgar and blasts him with three beams of purple crackling force.
Eldritch blast: 21 Force: 9
Eldritch blast: 19 Force: 12
Eldritch blast: 30 Force: 15

(Extra crit damage: 2 )

Wulgar moves to confront the Peg Leg version of himself, taking two mighty swings with his great axe.  “What the hell happened to you?  This is not a look that I want to have!”  

Great axe swing 1 : Attack: 20 Damage: 17 

Great axe swing 2 : Attack: 17 Damage: 19 

Divine fury damage : 7 

     Mulligan's hand quickly slip back and forth, grabbing daggers and chucking them at PegLeg Wulgar.  One, two and then a third dagger gets thrown... Mulligan then moves 30' towards PegLeg Wulgar, once more drawing his rapier.

Dagger Attack: 12 Damage: 7

Dagger Attack: 3 Damage: 7

Bonus action Dagger Attack: 5 Damage: 5

((I believe this leaves Mulligan one dagger on him until he has a chance to go recover them...))

Quote from Kaemgen >>

     Mulligan's hand quickly slip back and forth, grabbing daggers and chucking them at PegLeg Wulgar.  One, two and then a third dagger gets thrown... Mulligan then moves 30' towards PegLeg Wulgar, once more drawing his rapier.

Dagger Attack: 16 Damage: 8

Dagger Attack: 13 Damage: 8

Bonus action Dagger Attack: 13 Damage: 5

((I believe this leaves Mulligan one dagger on him until he has a chance to go recover them...))

 I forgot to put the attack modifier in the string, apparently.  Those should all be +9 for attacks of:  25,  22 and 22...